package com.atgugu.springcloud.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atgugu.springcloud.entities.CommonResult;
import com.atgugu.springcloud.entities.Payment;
import com.atgugu.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @author ZhangXinWang
 * @date 2022/12/25 19:17
 */
@RestController
@Slf4j
public class CircleBreakerController {

    @Value("${server-url.nacos-user-service}")
    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback") //没有配置
//    @SentinelResource(value = "fallback", fallback = "handlerFallback") //fallback只负责业务异常
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler") //blockHandler只负责sentinel控制台配置违规
    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class}) //blockHandler只负责sentinel控制台配置违规
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(
                SERVICE_URL + "/paymentSQL/" + id,
                CommonResult.class,
                id);
        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException,非法参数异常.....");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException,该ID没有对应记录,空指针异常");
        }
        return result;
    }

    //本例是fallback
    public CommonResult handlerFallback(@PathVariable Long id, Throwable e) {
        System.out.println("CircleBreakerController.handlerFallback");
        Payment payment = new Payment(id, "null");
        return new CommonResult(444,
                "兜底异常handlerFallback,exception内容 " + e.getMessage(),
                payment);
    }

    //本例是blockHandler
    public CommonResult blockHandler(@PathVariable Long id, BlockException blockException) {
        Payment payment = new Payment(id, null);
        return new CommonResult(445,
                "blockHandler-snetinel限流,无此流水:blockException" + blockException.getMessage(),
                payment);
    }

    @Resource
    private PaymentService paymentService;

    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable Long id) {
        return paymentService.paymentSQL(id);
    }


}
